Process and apparatus for the manufacture and leering of glass sheets



July 26, 1932. M. BlcHERoux PROCESS` AND APPARATUS FOR THE MANUFACTURE AND LEERING OF GLASS SHEETS Filed Aug. 6. 1928 QQQQQQQQQQQG@ eeeeaaaeaeee a e eeeef@ Patented lJuly )26, 1932 rUNITED sTATxl-:s' PATl-:NT f oFFlcE ZMAX BICHEROUX, OF AACHEN, GERMANY, ASSIGNOB, I-BY MESNE- ASSIGNMENTS, T0

T HE AMERICAN BICHEROUX COMPANY, vA CORPORATION OF DELAWARE PROCESS AND APFARATUS FOB THE HANUFACTUBE AND LEEBING OF GLASS SHEETQ Application led August 6, 1928,` Serial No. 297,666, and 1n Gerinany April 7, 1928.

In the leering of glass sheets formed bythe so-called intermittent forming process, such for instance as the Bicheroux process, certain diculties arise from the fact that the speed at which the sheet is formed is much higher than the speed at which it is desirable to feed the sheet through the leer.

- If the sheets as formed are received on a take-0H member which carries them away from the forming pass at the speed of sheet formation and are delivered from the meinber to the leer conveyor, there is in all systems known today a change of speed of the travel in the sheet of glass, and this is generally accomplished by intricate mechanisms to cause a variation in the speed of a part of the sheet carrying device. l

My present invention provides a system in which the sheets may be formed athigh speed and properly deposited on a take-off and fed through a leer at low speed without having its speed of travel altered." This I accomplish by depositing the sheet on a conveying member which moves the sheet at the speed at which the sheet is to be /fed in leering and from which it is fed into the leer, and moving the point of sheet formation in a direction opposite to that in which the sheet is moved by the conveyor at a speed equal to or if preferred, slightly greater, than the difference between the speed of travel during leering and the speed of sheet formation. To accompljsh this my invention consists in the method hereinafter described and in mechanism for carrying out the same.

v In this application Iflhave shown one form of such mechanism but it vwill'be understood that this may take different forms.

Referring to the accompanying drawing in which correspondingparts are designated by corresponding marks of reference,-

Figure lis a diagrammatic side elevation of a mechanism invented by me and adopted to carry out the improved method.

Figure 2 is a vertical transverse section on line -2-2 of Figure 1.

l `In this drawing, A represents a part of a leer of any improved construction provided with proper means for ,moving a. sheet of glass therethrough. In the drawing these .be used in means are `shown as a series of rolls B which form a feeding bed for the sheets fed therethrough. Before the entrance of the leer, is located the take-pify able C which receives the glasssheet from t e forming mechanism and delivers it into the leer. This table has a sheet feeding surface which in the form shown is lcomposed of a series of rollers D driven by a longitudinal shaft E from the drive of the leer conveyor, and is in the form shown, a forward continuation of the latter, so that the peripheral speed of the rolls D is the same as that of the initial rolls 'B of the leer conveyor. l Located above the take-olf table C is the forming pass F, made by the ga between the sheet forming rolls G and These rolls are mounted on a frame H straddling the table C and movable lengthwise of the table on tracks If-L, by any suitable means such as a motor It connected to and driving the wheels h2. shown vis of .thev ceiver ha is shown adjacent to the forming pass. On thisfreceiver is accumulated the molten glass from which the sheetis formed. While I have shown a forming device of this type, any other forming adevices couldl carrying out myinvention. With the parts so arranged and the rolls B and D revolving,

receiver h3 with the rame H at Qa'point intermediate the/length of the table C, the form` ing rolls are rotated and the` frame H put into motion away from the leer with a speed of translation substantially equal to the difference between the speed at which the sheet is issued from the forming machine and the peripheral speed of the slowly revolving rolls D. Thus the point of origin or formatlon of the sheet is shifted during the. formation of the sheet in a. direction opposite tothe direc- Jtion of the feeding of the sheet. The sheet is fedby the rotation of the rolls D to the leer. It will of course be understood that kafter the delivery of the entire sheet to the table C the sheet may, if desired, be given .any desired motions`thereon without losing that desirable feature of my invention which .permits a sheet formed at high speed to be lass is poured on the As the forming mechanism Bich'ero'ux type, a glass re' prises moving ceiving delivered to a take-off bed without necessitating a high speed of translation of the sheet on that bed.

Having thus I claim and desire to secure by ent is v 1. 'Ihe hereinbefore described method of forming and leering glass sheets which coma sheet as formed towards the the point of -sheet formation away from the leer during the formation of the sheet, and moving the formed sheet through the leer at a speed less than that of sheet formation.

2. Apparatus for making a sheet of glass, comprising a leer having continuously operating forwarding means, a runway at the entrance end of the leer also having continuously operating forwarding means constituting an extension of the forwarding means in `the leer, a car mounted for movement back and forth along the runway, means for moving the car, a pair of sizing rolls carried by the car above the runway, and means for rotating the sizing rolls as the car is moved back along the runway at a rate of peripheral speed which is greater than the speed of movement of' said forwarding means and which is also greater than the rate of movement of the car.

3. Apparatus'for making a sheet of glass, comprising a roller leer having a roller runway at its entrance end constituting a continuation of the leer runway, a car mounted for movement along the runway, a pair of sizing rolls carried by the car above the runway, and driving means for the car, the sizing rolls and the leer and 'runway rolls arranged to give the sizing rolls a rate of peripheral speed which is greater than the peripheral speed of the leer and runway rolls and also greater than the rate of movement of the car.

4., The combination with a sheet glass forming machine, of a leer, means for rea sheet from the forming machine and feeding it through the leer at leering speed, and means for moving the forming machine away from the leer during the formation of-the sheet: at a speed equal to the difference between the speed of sheet formation and the speed of feed through the leer.

5. An apparatus for making a sheet of glass, .comprising a leer having a continuously operating forwarding means, a runway at the entrance of the leer also having continuously operating forwarding means constituting an extension of the forwarding means in the leer, a car moving back and forth above the runway, a pair of sizing rolls rotating in the car, said sizing rolls being described my invention what Letters Patleer, moving v driven at a rate of peripheral speed which is greater than the speed of movement of said forwarding means and which is also greater than the rate of movement of the car by an amount which is approximately equal to the rate of movement of said forwarding means.

6. Apparatus comprising a roller leer having a roller runway at its entrance and constituting an exfor making a sheet of vglass tension of the leer runway, a car movlng along the runway, a pair of sizing rolls carried by the car, driven at a peripheral speed greater than the peripheral speed of the leer and runway rolls, and also greater than the rate of movement of the car by an amount which is approximately equal to the peripheral speed of the leer and runway rolls.

7 Apparatus for making a sheet of glass comprising a leer having continuously operating forwarding means, a runway at t e entrance end of the leer also having continuously operating forwarding means constituting an extension of the forwarding means in the leer, a car mounted for movement back and forth along the runway,a pair of rotatable sizing rolls carried by the car, rotated as the car is moved back along the runway at a rate of peripheral speed which is greater than the speed of movement of said forwarding means and which is at least equal to the rate of movement of the car.

8. Apparatus for making a sheet of glass, comprising a leer having continuously operating forwarding means, a runway at the entrance end of the leer also having continuously operating f-orwarding means constituting an extension of the forwarding means in the leer, a car mounted for movementback and forth along the runway, means for moving the car, a pair of sizing rolls carried by the car above the runway, and means for rotating the sizing rolls as the car is moved back along the runway at a rate of peripheral speed which is greater than the speed of movement of said forwarding means an which is also greater than the rate of movement of the car by an amount which is approximately equal to the rate of movement of said forwarding means.

9. Apparatus for making a sheet of glass, comprising a roller leer having a roller runway at its entrance end constituting a continuation of the leer runway, a car mounte for movement along the runway,'a pair of sizing rolls carried by the car above the runway, and driving means for the car, the sizing rolls and the leer and runway rolls arranged to give the sizing rolls a rate of peripheral speed which is greater than the peripheral speed of the leer and runway rolls,

and also greater than the rate of movement signature.

MAX BICHEROUX. 

